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Electromagnetic Waves 8th Grade
  • 1. Global Positioning System signals can tell you
A) who is sending a message to your cellphone
B) what television station you are tuned to
C) how many satellites are in orbit
D) your exact location on Earth
  • 2. Which waves have some electrical properties and some magnetic properties?
A) transverse waves
B) mechanical waves
C) electromagnetic waves
D) longitudinal waves
  • 3. Electromagnetic waves can transfer energy without a(n)
A) change in either a magnetic or an electric field
B) electric field
C) medium
D) magnetic field
  • 4. The range of electromagnetic waves placed in a certain order is called the
A) electromagnetic field
B) electromagnetic spectrum
C) electromagnetic frequency
D) electromagnetic wavelength
  • 5. Which model of light helps explain the photoelectric effect?
A) the particle model
B) the wave model
C) the polarizing model
D) the electromagnetic model
  • 6. FM signals travel as changes in
A) the loudness of the wave
B) the amplitude of the wave
C) the frequency of the wave
D) the speed of the wave
  • 7. On AM broadcasts, what remains constant?
A) the frequency
B) the speech
C) the amplitude
D) the music
  • 8. Which electromagnetic waves have the longest wavelengths and lowest frequencies?
A) gamma rays
B) infrared waves
C) radio waves
D) ultraviolet waves
  • 9. Light that has passed through a polarizing filter is called
A) transverse light
B) photoelectric light
C) white light
D) polarized light
  • 10. Visible light can be separated into various colors to form a(n)
A) X-ray picture
B) MRI
C) spectrum
D) thermogram
  • 11. What kind of waves do cellular telephones use to transmit and receive signals?
A) gamma rays
B) infrared rays
C) ultraviolet rays
D) microwaves
  • 12. The images made by an infrared camera are called
A) ultraviolet images
B) magnetic resonance images
C) X-rays
D) thermograms
  • 13. In the phenomenon known as the _________, electric current will flow when light shines on certain substances.
A) electromagnetism
B) electromagnetic spectrum
C) photoelectric effect
D) electricity
  • 14. Which letter shows the type of wave that can be seen by the human eye?
A) A
B) B
C) C
D) D
  • 15. What is the name of the type of wave labeled C?
A) infrared rays
B) ultraviolet rays
C) visible light
D) radar
  • 16. Which letter indicates X-rays?
A) D
B) A
C) B
D) C
  • 17. What type of wave that has the highest frequency?
A) infrared rays
B) gamma rays
C) microwave
D) x-rays
  • 18. What type of wave that has the the greatest energy?
A) infrared rays
B) x-rays
C) microwave
D) gamma rays
  • 19. What type of wave is labeled A?
A) ultraviolet
B) visible light
C) infrared
D) radio
  • 20. What is the object labeled as A?
A) ground receiver
B) communications satellite
C) radio waves
D) ground transmitter
  • 21. What is the object labeled B?
A) radio waves
B) communications satellite
C) ground receiver
D) ground transmitter
  • 22. What is the object labeled C?
A) communications satellite
B) radio waves
C) ground transmitter
D) ground receiver
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